(1)用反证法证明:对任意的
,关于
的方程
与
至少有一个方程有实根;
(2)若不等式
对于一切实数
都成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8488e2f76390a40e4f14de417c2a4b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4948941e66091d25a45fbea40c44ea85.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b56faaf0c9eee7ee0cebbd3416dbc9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
23-24高一上·上海徐汇·期中 查看更多[2]
更新时间:2023-11-09 10:34:31
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)若对任意
,都有
成立,求实数a的取值范围;
(2)解关于x的不等式
,其中实数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661cdfc0b14811901f8736976eddb232.png)
(1)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a71f03e80d6460ca90d5ee36397cf6.png)
(2)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知
关于
的不等式
的解集为
,
方程
表示圆.若
为真且
为真,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5542f658e0b650e29174229e9e9583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ebc7922658fcfcab5d56d8c59d830f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】已知函数
,M为不等式
的解集.
(1)求M;
(2)证明:当a,
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2ddb7837483f813747333a380d23c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdf1eec5487c094e8d38cbc77b91604.png)
(1)求M;
(2)证明:当a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab92728b35ed5798e07a2b0095bfcc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087808e9fef50f78d8678ada29b443dc.png)
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解答题-证明题
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适中
(0.65)
【推荐2】已知数列
满足
,
.
(1)求证
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937ce158fe772ae70cd797f6514a0779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe50c26147bbdc9874ec6e60f38293a8.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06dfdac83e7aaac092e7e7a4e91a2e9d.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d514eb8dff80d4dc3f39de516b63b846.png)
(3)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78816854e432159b3a2adddc45fbdede.png)
您最近一年使用:0次